my dad thought if roosevelt got elected there'd never be another election. >> reporter: a vocal republican in his earlier years, he now leans left and a big obama supporter. >> i brought along figures i thought would be of interest to him, that was when i got the presidential medal of freedom. >> reporter: he's never had political ambitions like his father. >> that's my dad's campaign picture when he was 39 years old running for congress in 1942. this is my dad's desk, this sat on his desk when i was a kid, when i was 10 years old. i always admired it. >> reporter: i love this, the too hard box. >> there's a lot of things that belong in there. the real problem is if they belong in there and i don't realize it. >> reporter: then the model mars rover given to him by opportunities at caltech. >> that beats getting a t shirt. >> reporter: and the mock "sports illustrated" cover. >> they'll bring me out as water boy. >> reporter: no e-mail, perhaps the secret to buffett's success. i am convinced no e-mail is the secret to his success. >> who is tweeting while you're talking here? >> the amount